1. Department of Rehabilitation, Hospital for National Rehabilitation Center for Persons with Disabilities, Tokorozawa, Saitama, Japan
2. Department of Rehabilitation Medicine, The University of Tokyo Hospital, Bunkyo-ku, Tokyo, Japan
3. Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
4. Department of Rehabilitation Medicine, The University of Teikyo Hospital, Itabashi-ku, Tokyo, Japan
5. Department of Health Policy and Informatics, Tokyo Medical and Dental University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan